Jack-o-lard
That person who won’t stop making a big deal about something, but when it’s done, they don’t even say thank you.
He kept going on about getting my lunch money. When I gave it to him, he didn’t even say thanks.
She kept making a big deal about borrowing my pencil. When I gave it to her, she just walked away.
He kept yelling at me for my mistake. When I fixed it, he didn’t even look at me.